BLACKLINE INC (BL) Institutional Shareholders
BLACKLINE INC (BL) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $2.23B in BL holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of BL tracked by InsiderSet, reporting ownership valued at approximately $284.20M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $241.18M, representing an estimated loss of -15.14% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 58% of the total disclosed BL value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Clearlake Capital Group, L.P., Vanguard Portfolio Management Llc, and several other long-term asset managers with concentrated positions in BLACKLINE INC (BL).
This page ranks the largest institutional BL shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
264
Total Reported Value
$2.23B
Largest Holder
Blackrock, Inc.
Largest Position
$284.20M
Insider Transactions (90d)
25
Latest Filing Quarter
Q2 2026
New Institutional Positions
85
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 7,680,962 | $284,195,577 | $241,182,207 | -$43,013,370 | -15.14% | |
| Clearlake Capital Group, L.P. | 31.06% | 5,712,300 | $211,355,100 | $179,366,220 | -$31,988,880 | -15.14% | |
| Vanguard Portfolio Management Llc | 0.01% | 4,062,856 | $150,325,672 | $127,573,678 | -$22,751,994 | -15.14% | |
| Ubs Group Ag | 0.02% | 3,203,298 | $118,522,026 | $100,583,557 | -$17,938,469 | -15.14% | |
| Fivespan Partners, Lp | 29.55% | 3,013,943 | $111,515,891 | $94,637,810 | -$16,878,081 | -15.14% | |
| First Manhattan Co. Llc. | 0.27% | 2,676,987 | $99,048,519 | $84,057,392 | -$14,991,127 | -15.14% | |
| Vanguard Capital Management Llc | 0.00% | 2,349,160 | $86,918,920 | $73,763,624 | -$13,155,296 | -15.14% | |
| Iconiq Capital, Llc | 1.73% | 2,087,081 | $77,221,997 | $65,534,343 | -$11,687,654 | -15.14% | |
| State Street Corp | 0.00% | 2,040,318 | $75,491,766 | $64,065,985 | -$11,425,781 | -15.14% | |
| Neuberger Berman Group Llc | 0.06% | 2,024,391 | $74,902,467 | $63,565,877 | -$11,336,590 | -15.14% | |
| Hawk Ridge Capital Management Lp | 2.54% | 1,890,823 | $69,960,451 | $59,371,842 | -$10,588,609 | -15.14% | |
| Westwood Holdings Group Inc | 0.39% | 1,456,649 | $53,896,013 | $45,738,779 | -$8,157,234 | -15.14% | |
| Engaged Capital | Glenn W. Welling | 16.68% | 1,367,619 | $50,601,903 | $42,943,237 | -$7,658,666 | -15.14% |
| Geode Capital Management, Llc | 0.00% | 1,234,191 | $45,673,737 | $38,753,597 | -$6,920,140 | -15.15% | |
| Morgan Stanley | 0.00% | 1,083,687 | $40,096,448 | $34,027,772 | -$6,068,676 | -15.14% | |
| Dimensional Fund Advisors Lp | 0.01% | 1,063,655 | $39,354,410 | $33,398,767 | -$5,955,643 | -15.13% | |
| Bank Of America Corp | 0.00% | 914,813 | $33,848,069 | $28,725,128 | -$5,122,941 | -15.14% | |
| Fmr Llc | 0.00% | 885,381 | $32,759,105 | $27,800,963 | -$4,958,142 | -15.14% | |
| Tensile Capital Management Lp | 3.98% | 750,786 | $27,779,082 | $23,574,680 | -$4,204,402 | -15.14% | |
| First Trust Advisors Lp | 0.02% | 616,716 | $22,818,492 | $19,364,882 | -$3,453,610 | -15.14% | |
| Northern Trust Corp | 0.00% | 591,514 | $21,886,018 | $18,573,540 | -$3,312,478 | -15.14% | |
| Charles Schwab Investment Management Inc | 0.00% | 520,850 | $19,271,450 | $16,354,690 | -$2,916,760 | -15.14% | |
| Goldman Sachs Group Inc | 0.00% | 508,929 | $18,830,373 | $15,980,371 | -$2,850,002 | -15.14% | |
| Geneva Capital Management Llc | 0.38% | 478,086 | $17,689,189 | $15,011,900 | -$2,677,289 | -15.14% | |
| Arrowstreet Capital, Limited Partnership | 0.01% | 468,519 | $17,335,203 | $14,711,497 | -$2,623,706 | -15.14% | |
| Palisade Capital Management, Lp | 0.54% | 441,232 | $16,325,584 | $13,854,685 | -$2,470,899 | -15.14% | |
| Potrero Capital Research Llc | 9.56% | 421,149 | $15,582,513 | $13,224,079 | -$2,358,434 | -15.14% | |
| Jupiter Asset Management Ltd | 0.08% | 390,787 | $14,459,119 | $12,270,712 | -$2,188,407 | -15.14% | |
| Bank Of New York Mellon Corp | 0.00% | 377,360 | $13,962,331 | $11,849,104 | -$2,113,227 | -15.14% | |
| Bnp Paribas Financial Markets | 0.01% | 376,466 | $13,929,242 | $11,821,032 | -$2,108,210 | -15.14% | |
| Principal Financial Group Inc | 0.01% | 361,796 | $13,386,452 | $11,360,394 | -$2,026,058 | -15.14% | |
| Vanguard Fiduciary Trust Co | 0.00% | 349,982 | $12,949,334 | $10,989,435 | -$1,959,899 | -15.14% | |
| Barclays Plc | 0.00% | 331,995 | $12,283,815 | $10,424,643 | -$1,859,172 | -15.14% | |
| Westerly Capital Management, Llc | 3.53% | 310,000 | $11,470,000 | $9,734,000 | -$1,736,000 | -15.14% | |
| Gagnon Securities Llc | 2.53% | 296,424 | $10,967,688 | $9,307,714 | -$1,659,974 | -15.14% | |
| Royal Bank Of Canada | 0.00% | 259,350 | $9,595,000 | $8,143,590 | -$1,451,410 | -15.13% | |
| Invesco Ltd. | 0.00% | 252,140 | $9,329,180 | $7,917,196 | -$1,411,984 | -15.14% | |
| Ameriprise Financial Inc | 0.00% | 249,288 | $9,223,656 | $7,827,643 | -$1,396,013 | -15.14% | |
| Invenomic Capital Management Lp | 0.40% | 235,012 | $8,695,444 | $7,379,377 | -$1,316,067 | -15.14% | |
| Susquehanna International Group, Llp | 0.01% | 230,521 | $8,529,277 | $7,238,359 | -$1,290,918 | -15.14% | |
| Federated Hermes, Inc. | 0.01% | 215,207 | $7,962,659 | $6,757,500 | -$1,205,159 | -15.14% | |
| Balyasny Asset Management L.P. | 0.02% | 210,169 | $7,776,253 | $6,599,307 | -$1,176,946 | -15.14% | |
| Bank Of Montreal | 0.00% | 181,998 | $6,733,926 | $5,714,737 | -$1,019,189 | -15.14% | |
| Public Sector Pension Investment Board | 0.02% | 178,722 | $6,612,714 | $5,611,871 | -$1,000,843 | -15.14% | |
| Millennium Management Llc | 0.00% | 173,164 | $6,407,068 | $5,437,350 | -$969,718 | -15.14% | |
| Fifth Third Bancorp | 0.01% | 172,964 | $6,399,676 | $5,431,070 | -$968,606 | -15.14% | |
| Armistice Capital, Llc | 0.21% | 168,000 | $6,216,000 | $5,275,200 | -$940,800 | -15.14% | |
| Walleye Trading Llc | 0.09% | 219,630 | $6,165,014 | $6,896,382 | +$731,368 | +11.86% | |
| Tejara Capital Ltd | 1.98% | 162,300 | $6,005,100 | $5,096,220 | -$908,880 | -15.14% | |
| Citadel Advisors Llc | 0.00% | 159,199 | $5,890,363 | $4,998,849 | -$891,514 | -15.14% |
Frequently asked questions about BL
Who owns the most BL stock?
The largest holders of BL are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for BLACKLINE INC (BL).
Is BL widely held by superinvestors?
Many widely followed stocks like BL appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly BL is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.